Stop ActiveX Controls resizing randomly under Windows 7 and Excel 2010

I have ActiveX controls on a worksheet which sometimes have their properties randomly rest (e.g. width, height, font size).

This does not seem to happen with Windows XP and Excel 2007.
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Rory ArchibaldCommented:
ActiveX controls on worksheets are notorious for this kind of behaviour in all versions of Excel. It's often related to the zoom of the window not being set to 100% but can be caused by other things. As a general rule I would recommend using Forms controls instead if you can, or use code to reset the sizes when the sheet is activated if it's a real issue.

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NormanMitchellAuthor Commented:
It may also be solved by setting the LockAspectRatio to true -right click the control, select format control and check the Lock Aspect Ratio check box.

This appears to have worked but it has not been in use long enough to confirm that this is a long term solution.
NormanMitchellAuthor Commented:
I am not convinced that this is the entire solution - see my own comments of 2 April 2011
Thanks Rory, it really helped me out...I was in the same boat
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Windows XP

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